Building devel branch with MXE

[Rik]

I'm trying to build the development branch of Octave with MXE.  I made a
tarball from a local repository with 'make dist-bzip2' and placed it in the
pkg directory of MXE.  After that I munged the octave.mk file to look for
version 4.1.0+.  I've now built all the prerequisites, but I'm failing to
build Octave itself.  First, the patch octave-1-docinstall.patch doesn't
apply because it is looking for doc/interpreter/Makefile.in and there is
now only one Makefile.in at the top-level.  I just deleted the patch for
the time being.  But now I'm failing on something that looks more
fundamental, a lack of <sys/times.h>.  This has been in the code since 2010
so it isn't a new requirement. 

/home/rik/wip/Projects_Mine/mxe-octave/tmp-octave/octave-4.1.0+/libinterp/corefcn/data.cc:31:23:
fatal error: sys/times.h: No such file or directory
 #include <sys/times.h>
                       ^
compilation terminated.

If I do a find in the MXE directory it is clear that there is no times.h
anywhere in the source tree.  Is anyone else having this problem?  Should
we be falling back to gnulib and using the sys_times module to supply this
header file?

--Rik